Table of Contents vii
5.9 CROS, and BICROS ..................................................................................162
5.9.1 Measuring the Head-Baffle Effect..............................................................162
5.9.2. Measuring the Overcoming of the Head-Baffle Effect..........................................163
5.9.2.1 CROS ...................................................................................163
5.9.2.2 BI-CROS................................................................................163
5.9.3 Measuring Overall Insertion Gain .............................................................164
5.9.3.1 CROS ...................................................................................164
5.9.3.2 BI-CROS ................................................................................165
5.9.4 Measuring Insertion Loss to the “Good” Ear (CROS) ...........................................165
Chapter 6: 2-CC Targets ...............................................................167
6.1 Target Creation.......................................................................................168
6.2 The Coupler Target and Coupler EarSim Displays ...................................................169
6.2.1 Viewing the Coupler Target Screen ............................................................169
6.2.2 Viewing the Coupler EarSim Screen............................................................171
6.3 Measurements & Adjustments .......................................................................172
6.3.1 Taking Basic Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173
6.3.2 Viewing Target Data ............................................................................173
6.3.3 Tying the Target to a Measurement Curve ......................................................174
6.4 Reference............................................................................................175
Chapter 7: The Audiometer Option ....................................................181
7.1 Introduction .........................................................................................181
7.2 Equipment...........................................................................................181
7.3 Setup ................................................................................................181
7.3.1 Sound Field Speaker...........................................................................181
7.3.2 Insert Earphones ..............................................................................184
7.4 Taking Audiometric Measurements ..................................................................184
7.4.1 Measurements in HL...........................................................................184
7.4.2 Measurements in SPL..........................................................................184
7.4.3 Measurements in Gain.........................................................................185
7.5 Output Limitations ..................................................................................185
Chapter 8: Spectrum Analysis .........................................................187
8.1 Spectrum Analysis Measurements...................................................................187
8.2 Using the Spectrum Analysis Mode..................................................................187
8.3 Technical Details.....................................................................................188
Appendix A: Specifications ...........................................................191
Appendix B: Software Upgrades ......................................................195
Appendix C: Calibration ..............................................................199
Appendix D: Fitting Formula Tables ...................................................205
Appendix E: SPL Conversions .........................................................209
Appendix F: Digital Speech Technical Details ..........................................213
